Daikin B-Series Service Manual page 208

Si12-714
Troubleshooting
Check No.05
Refer to P.218
Check No.06
Refer to P.219
Check No.11
Refer to P.222
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Four-way valve coil
disconnected (loose)?
NO
Harness out of connector?
NO
Check the continuity of the four-
way valve coil and harness.
Disconnect the
harness from
the connector.
Resistance between
harnesses about
1500 ohms?
YES
Check No. 05
Check the four-way valve
switching output.
Functioning
Any thermistor disconnected?
NO
Check No. 06
Check the thermistors.
Functioning
Check No. 11
Check the refrigerant line.
Functioning
YES
YES
NO
Malfunctioning
YES
Malfunctioning
Malfunctioning
Water mixed
Shut-off valve defective
Troubleshooting
Correct.
Reconnect.
Replace the four-way valve
coil.
Replace the outdoor unit
PC board.
Reconnect in position.
Replace a defective
thermistor.
Refer to the refrigerant line
check procedure.
Replace the four-way valve
(defective or dust-clogged).
(R4717)
197